REPORT ON THE GASTEROPODA. 365 



Colour white. Spire rather squat, but conical and small-topped. Apex: there seem to 

 have been about 3^ or 4 small, conical, turbinate whorls, but the tip is crushed ; they are 

 scored with very short little bars above, which split into reticulations below. Whorls 4 

 besides the apex ; they have a sloping shoulder above, are angulately keeled about the 

 middle, below this they are convexly cylindrical, with a very slight amount of contraction 

 into the suture ; the body-whorl is tumid, with a short rounded base, produced into a 

 smallish, rather long, subtriangular truncated snout. Suture almost horizontal, a little 

 impressed. Mouth oval, very slightly augulated above, and drawn out into a short obbque 

 canal in front. Outer lip thin, well arched, slightly flattened along the canal ; it has a 

 deep, wide, open sinus above, which is barely separated from the suture by a minute ledge ; 

 from the sinus the lip-edge sweeps forward with a great wing-like curve, and then bends 

 back to the edge of the canal. Inner lip : there is a very thin glaze on the body, and 

 here the line of the lip is quite flat, at the base of the pillar it is bluntly obtuse, after 

 which it runs straight forward ; the point of the pillar is barely cut off, but the lip-edge 

 twists out in a long-drawn continuous line. H. 0*5 in. B. - 28. Penultimate whorl, 

 height 0-08. Mouth, height 0'32, breadth 0'13. 



19. Clathurella (Daphnella) monoceros, Watson (PI. XX. fig. 1). 



Pleurotoma (Thesbia 1) monvceros, "Watson, Prelim. Report, pt. 9, Journ. Linn. Soc. Lond., vol. xv. 



p. 449. 



Station 104. August 23, 1873. Lat. 2° 25' N., long. 20° 1' W. South-west of 

 Sierra Leone. 2500 fathoms. Globigerina ooze. Bottom temperature 3 6° '6. 



Shell. — Thin, ivory-white, high, narrow, drawn out, with fine spiral threads, a very 

 obbque impressed suture, rounded whorls, and a contracted base produced into a longish 

 snout. Sculpture : Longitudinals — none but fine, somewhat unequal lines of growth. 

 Spirals — with the exception of the sinus-area, the whole surface is covered by fine, 

 rounded, unequal, and irregularly interrupted spiral threads with rather broader intervals. 

 Colour porcellanous, ivory-white, glossy. Spire remarkably narrow, high, drawn out and 

 conical. Apex broken. Whorls 5 remaining, but probably 8 to 9 in all, of very regular, 

 but rather rapid increase, high, oblique, slightly tumid ; the last rounded, with a conical, 

 protracted, but very lop-sided base running out into a longish straight pillar and triangular 

 snout. Suture very oblique and rather deeply impressed. Mouth pear-shaped, scarcely 

 pointed above, and protracted into a gradually narrowing canal below. Outer lip : a very 

 regular curve in both its planes ; the outer edge has a very high and prominent shoulder, 

 whose upper side runs a long way parallel to the body-whorl above it, having a very deep 

 rather than narrow sinus, between which and the body-whorl is no shelf whatever. Inner 

 lip is on the narrow body scarcely perceptible as a glaze ; on the long direct twisted 

 pillar it is a little thicker, but is very narrow ; the end of the pillar is cut off with a very 



